The No. 4 Mobile Investigation Unit was quickly pieced together as part of reform efforts to overhaul the police organization. There, a wild maverick of a cop, Ibuki, gets paired with a serenely composed partner, Shima. Their role is to be on call 24 hours to fill in gaps in police shifts by investigative Units 1 to 3, to be the first investigators on crime scene and to risk their lives for a perfect criminal apprehension rate. In an increasingly morally relativistic world, questions such as “What is real justice” are posed in thrillingly fast-paced and comical whodunit fare with each episode a complete story.

In 2002, a kidnapping has eerie parallels with ‘six-four’, an unsolved case from 1989 on which the Statute of Limitations looms one year hence.
The year 1989 began in Japan as ‘Showa 64’, the 64th year of the reign of the Showa Emperor Hirohito. With his death on January 8th, a new era began, and 1989 became ‘Heisei 1’.
On January 5th, a young girl is kidnapped. The kidnapper escapes with 20 million yen, but the girl is found murdered. Now, 14 years later, her father, a few aging police investigators, and the kidnapper himself still live in that week, in the case they have called ‘six-four’.
Former Detective Mikami has been moved from Investigations to the Administrative side of the Gunma Prefectural Police, where as Chief PR Officer he battles a recalcitrant press corps, Administration bureaucrats concerned only with the machinations of the National Police Agency in Tokyo, and his ex-colleagues suspicious of him and resentful of Tokyo’s attempts to assert control over the way they do their jobs. As the 15-year Statute of Limitations looms over the ‘6-4’ investigation, Tokyo is about to usurp the right to appoint Gunma’s Chief of Detectives. But now another girl has gone missing...

A nation of people seemingly content to go about their business, not thinking too much, but simply trying to lead normal and peaceful lives. And then one day, a bus jacking incident occurs to rouse them from their reverie.
Ex-boxer turned cop, Ichigo Kamikura leads the NPS (National Police Safety Rescue), called “S”, effort to deal with the crisis, but so far, no demands have come from the perpetrator, and a sinking feeling of impending doom sets in among the force. Sure enough, a massive tanker off the Japanese coast in the Pacific is next reported as having been seized! On board is enough nuclear fuel to blow up the entire country.
A final battle begins with the nation’s future and the lives of 120 million at stake.....!

In 48 B.C., Julius Caesar gave Cleopatra a diamond necklace as proof of his love for her. Over the centuries, this necklace became a legendary and highly-coveted treasure and symbol of ultimate beauty dubbed the Crimson Heart of Cleopatra (C.H.C). Inlaid with a ruby Red Diamond, the necklace was complete. But since ancient times, nobody has owned the two pieces together.
In possession of the Red Diamond is the Navarone Security Company, Asia’s largest security firm, under its shady CEO Pramuk. Meanwhile, the necklace is owned by Thomas Dawson, who rose to notoriety as former partner of the Lupin the Phantom Thief, Lupin III’s grandfather. After the death of Dawson, as inheritor of Dawson’s last will, Lupin III recruits Daisuke Jigen, Fujiko Mine and Goemon Ishikawa to help him penetrate the Arc of Navarone and steal back the treasure.

The National Police Safety Rescue Team “S” is a special task force charged with apprehending extreme criminals alive. When a certain incident leads the team to recruit retired pro boxer, Ichigo Kamikura, they acquire a cop with lightning quick reflexes and a walloping boxer’s punch, but Ichigo wields not “fists to vanquish” an opponent as much as “hands to protect” people. Meanwhile, Special Assault Team (SAT), Iori Soga, is hailed as having “divine” skills as a sniper in addition to a calm and collected personality, acute powers of perception and superlative strength in hand-to-hand combat. With their opposing personalities and philosophies, the two men clash constantly, yet put their lives on the line daily to defend Japan in a time when just about anyone harbors criminal potential. An all-new type of police drama is born.